Nick Lachey and Vanessa Minnillo having baby no. 2

By Breeanna Hare, CNN

Updated 3:20 PM ET, Wed July 16, 2014

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Oprah-approved interior designer Nate Berkus, left, and his partner, Jeremiah Brent, welcomed baby girl Poppy Brent-Berkus via surrogate on March 23. "We are so excited to finally be a family of 3!" Berkus wrote on Facebook.

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Mila Kunis and Ashton Kutcher welcomed their new addition, baby girl Wyatt Isabelle, on October 1. In March, Kutcher complained on Facebook that not enough public men's restrooms have diaper changing tables.

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Country music star Carrie Underwood, 31, revealed a photo of her newborn son on Twitter on Tuesday, March 3. "Tiny hands and tiny feet...God has blessed us with an amazing gift! Isaiah Michael Fisher - born February 27," she wrote on the social media site. It is the first child for Underwood and husband Mike Fisher, who plays in the NHL.

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"As I Lay Me Down" singer Sophie B. Hawkins revealed to People magazine that she's pregnant at age 50. Hawkins said she wants a sibling for her 6-year-old son, Dashiell, and feels healthy and strong enough for a second child. She used a frozen embryo with her own egg and donor sperm to conceive.

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Justin Timberlake and his wife, Jessica Biel, are expecting their first child. The singer used his 34th birthday to announce news of the impending arrival in a social media post. He said they don't know the sex of the baby but are taking bets.

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Shakira and her athlete beau, Gerard Pique, welcomed son Sasha Piqué Mebarak on January 29. "The hospital confirmed that both mother and child are in excellent health," reads a post on Shakira's website. The couple's first child, son Milan, was born in January 2013.

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Tiffani Thiessen and her husband, Brady Smith, announced on Instagram in January that a playmate for their daughter, Harper, is on the way. It will be the couple's second child.

Benedict Cumberbatch and his fiancee, Sophie Hunter, now need to plan for a wedding and a baby. A rep for Cumberbatch confirmed to The Guardian on January 7 that the couple is expecting their first child. "They are both over the moon," the rep said.

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Blake Lively and Ryan Reynolds welcomed their first child together in December, according to People magazine. Lively, 27, and Reynolds, 38, have yet to reveal the baby's name or sex. But Lively would say this: "This is the happiest time in my life, and I could say that every day. I often feel like, 'I can't believe I'm experiencing this.' "

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Vanessa Minnillo and Nick Lachey also welcomed their first daughter on January 5. They named their wee one Brooklyn Elisabeth Lachey. Big brother Camden was born in 2012.

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Tamera Mowry-Housley and husband Adam have announced that they're awaiting baby No. 2. The actress and TV personality shared the good news via Instagram on January 4. The couple welcomed their first child, Aden, in November 2012.

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Rapper Macklemore, whose real name is Ben Haggerty, and fiancee Tricia Davis announced in a YouTube video that they are expecting their first child in May.

"Fargo" actor Adam Goldberg and girlfriend Roxanne Daner are expecting a a baby. Goldberg said during the "WTF Podcast with Marc Maron" that the couple had a stillborn child about a year and a half ago and have kept this pregnancy quiet. "We weren't going to tell anybody," he said. "I mean, it's obvious. She's gigantic. But we weren't going to tell anyone unless you ran into her."

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Newlyweds Evan Ross and Ashlee Simpson are expecting their first child together. Simpson also has a 6-year-old son with former husband Pete Wentz of Fall Out Boy. Ross, the actor son of Diana Ross, and Simpson, a singer and the younger sister of pop star Jessica Simpson, tied the knot in August.

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For the 2015 awards season, Keira Knightley will be accessorizing a baby bump. The "Imitation Game" actress, who's been nominated for SAG and Golden Globes honors, is reportedly expecting her first child with husband James Righton.

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Britain's Catherine, Duchess of Cambridge, joins Prince William at a ceremony in London on October 21. She has struggled with severe morning sickness, and it was her first public appearance since Buckingham Palace announced that the pair are awaiting baby No. 2 in April.

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Stanley Tucci and his wife, Felicity Blunt, are expecting their first child together, but Tucci already has plenty of experience with diaper duty. The "Hunger Games" actor has three other children from his marriage to Kate Tucci, who died of cancer in 2009.

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With "Avengers: Age of Ultron" wrapped, Cobie Smulders is turning her attention to family. The actress and her husband, Taran Killam, are expecting their second child. They're also parents to daughter Shaelyn, 5.

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Donald Faison and CaCee Cobb are adding another member to their family. After welcoming their first child, Rocco, in August 2013, the couple have shared their latest baby news on Instagram. This will be actor Faison's sixth child; he also has four children from prior relationships.

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Alfonso Ribeiro had some big news to share during the October 27 episode of "Dancing with the Stars." The actor and "DWTS" competitor revealed that he and his wife, Angela Unkrich, are expecting their second child together. Ribeiro also has a daughter from a prior marriage.

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Kimora Lee Simmons has some news that's "Just Fab." The mom of three and president of a shoe and style company is expecting a child with new husband Tim Leissner, whom she wed in February.

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Nothing here for Jessica Pare to be "Mad" about! The "Mad Men" actress and her boyfriend, John Kastner, are expecting their first child together.

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Steven Tyler has something new to sing about. The Aerosmith frontman's daughter Liv is reportedly expecting her second child. Her 9-year-old son, Milo, is from her marriage to British musician Royston Langdon. Liv Tyler is currently said to be dating David Beckham's pal Dave Gardner.

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Linda Perry, left, and Sara Gilbert are adding an addition to their family. The couple, who wed in March, are now expecting their first child together. Gilbert has two kids from a prior relationship with TV producer Allison Adler.